KR20200127073A - Display device - Google Patents

Abstract

According to an embodiment of the present invention, a display device includes: a substrate including a first region and a second region; and a plurality of pixels disposed on the substrate, wherein the plurality of pixels each include a first data line and a second data line overlapping a pixel electrode. In a pixel located in a first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode. In the pixel located in a second area, a first capacitance between the first data line and the pixel electrode is greater than a second capacitance between the second data line and the pixel electrode. The present invention provides the display device capable of compensating for a difference in luminance.

Description

Display device {DISPLAY DEVICE}

The present disclosure relates to a display device, and more particularly, to a display device in which capacitance is different for each area of the display device.

The liquid crystal 　 display 　 device is one of the most widely used flat panel display 　 devices. It consists of two 　 display panels on which electric field generating electrodes such as a pixel electrode and a common electrode are formed, and a liquid crystal layer interposed therebetween, and voltage is applied to the electric field generating electrode. It is applied to create an electric field in the liquid crystal layer, and through this, the orientation of the liquid crystal molecules in the liquid crystal layer is determined and the polarization of the incident light is controlled to display an image.

The liquid crystal display device also includes a switching element connected to each pixel electrode and a plurality of signal lines such as a gate line and a data line for controlling the switching element to apply voltage to the pixel electrode.

Embodiments are to provide a display device capable of compensating for a difference in luminance due to a data voltage.

A display device according to an exemplary embodiment of the present invention includes a substrate including a first region and a second region, and a plurality of pixels positioned on the substrate, wherein the pixels include a first data line and a second data line overlapping a pixel electrode. In a pixel including a data line and located in the first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode, and is located in the second area. In the positioned pixel, a first capacitance between the first data line and the pixel electrode is greater than a second capacitance between the second data line and the pixel electrode.

The display panel may be scanned in a direction from a first area to a second area.

The plurality of pixels include a gate line on the substrate, a data line insulated from the gate line, the data line includes the first data line and the second data line, and the first data line and the second data line The pixel electrode overlapping the data line and a pixel electrode protrusion connected to the pixel electrode may be included, and the pixel located in the first region may include a second pixel electrode protrusion overlapping the second data line. .

The area of the first pixel electrode protrusion overlapping the first data line in the pixel located in the second region is greater than the area of the first pixel electrode protrusion overlapping the first data line of the pixel located in the first region. It can be wide.

The first data line may be electrically connected to a pixel electrode of the pixel, and the second data line may not be electrically connected to a pixel electrode electrically connected to the first data line.

The pixel includes a display area and a light blocking area, and a pixel located in the first area may have a width of the first data line narrower than a width of the second data line in the light blocking area.

In the pixel located in the second area, a width of the first data line in the light blocking area may be wider than a width of the second data line.

A plurality of semiconductor layers disposed between the gate line and the data line may be further included, and the plurality of semiconductor layers may include a dummy semiconductor layer disposed in a region where the gate line and the data line cross each other.

The gate line includes a first gate line, a second gate line, and a gate electrode positioned between the first gate line and the second gate line, and some of the plurality of semiconductor layers overlap the gate electrode. It is located and can constitute a transistor.

The first data line and the second data line are bent at one edge of the pixel electrode, and a length of the second data line may be longer than a length of the first data line.

A storage electrode line positioned on the same layer as the gate line, the storage electrode line including a first storage electrode line, a second storage electrode line, and a third storage electrode line, and the first storage electrode line The third storage electrode line may be positioned adjacent to the other edge of the pixel electrode, and the second storage electrode line may be positioned to overlap the center of the pixel electrode.

The first data line may be located between the first storage electrode line and the second storage electrode line, and the second data line may be located between the second storage electrode line and the third storage electrode line.

A display device according to another exemplary embodiment of the present invention includes a substrate including a first region and a second region, and a plurality of pixels disposed on the substrate, wherein the pixels include a first data line and a first data line overlapping a pixel electrode. 2 In a pixel including a data line, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode, and the first area In, the difference between the first capacitor and the second capacitance may be gradually decreased as the second area approaches.

In the pixel located in the second area, a first capacitance between the first data line and the pixel electrode is greater than a second capacitance between the second data line and the pixel electrode, and the first capacitance and the first capacitance in the second area The difference in the second capacitance may increase step by step as the distance from the first region increases.

In the central region of the substrate, the first capacitance and the second capacitance may be the same.

The plurality of pixels include a gate line on the substrate, a data line insulated from the gate line, the data line includes the first data line and the second data line, and the first data line and the second data line The pixel electrode overlapping a data line and a pixel electrode protrusion connected to the pixel electrode, and the pixel located in the first region includes a second pixel electrode protrusion overlapping the second data line, and the In the pixel located in the second area, the area of the first pixel electrode protrusion overlapping the first data line may be larger than the area of the first pixel electrode protrusion overlapping the first data line of the pixel located in the first area. have.

The pixel includes a display area and a light blocking area, and a pixel located in the first area has a width of the first data line smaller than that of the second data line in the light blocking area, and is located in the second area. In the pixel, a width of the first data line may be larger than a width of the second data line in the light blocking area.

The first data line may be electrically connected to a pixel electrode of the pixel, and the second data line may not be electrically connected to a pixel electrode electrically connected to the first data line.

A display device according to another exemplary embodiment of the present invention includes a substrate including a first region and a second region, and a plurality of pixels disposed on the substrate, wherein the pixels include a first data line and a first data line overlapping a pixel electrode. 2 A pixel including a data line, wherein the pixel positioned in the first region includes a second pixel electrode protrusion overlapping the second data line, and a first pixel positioned in the second region overlaps the first data line. The area of the pixel electrode protrusion is larger than the area of the first pixel electrode protrusion overlapping the first data line of the pixel located in the first area.

A display device according to another exemplary embodiment of the present invention includes a substrate including a first region and a second region, and a plurality of pixels disposed on the substrate, wherein the pixels include a first data line and a first data line overlapping a pixel electrode. 2 a data line is included, the pixel includes a display area and a light blocking area, and the pixel located in the first area has a width of the first data line narrower than the width of the second data line in the light blocking area, In the pixel located in the second area, a width of the first data line in the light blocking area is wider than a width of the second data line.

According to embodiments, a display device capable of compensating for a difference in luminance due to a data voltage is provided.

1 schematically illustrates a display device according to an exemplary embodiment of the present invention.
2 is a layout diagram of one pixel positioned in the first area A1.
3A is a cross-sectional view of the display device of FIG. 2 taken along line IIIa-IIIa'. 3B is a cross-sectional view of the display device of FIG. 2 taken along line IIIb-IIIb'.
4 is a layout diagram of one pixel positioned in the second area A2.
5 illustrates various causes and results that affect luminance in a display device.
6 is a measurement of luminance of a display device when an image not including a white box is displayed. FIG. 6(a) shows a measurement point, and FIG. 6(b) is an image measuring the luminance at the measurement point.
7 is a measurement of luminance of a display device when an image including a white box is displayed. Fig. 7(a) shows a measurement point, and Fig. 7(b) is an image of measuring luminance at the measurement point. 7(c) shows the luminance for each position in the same cross section as in FIG. 3B. 7(d) shows the reason why the luminance appears high near the first data line and the luminance appears low near the second data line.
FIG. 8 shows the luminance in the upper and lower regions of the white box of the display device when the self-capacitance is greater than the neighboring capacitance. Fig. 8(a) shows the brightness of the white box at the top and bottom when the self capacitance is greater than the neighboring capacitance. Figure 8(b) shows the voltage behavior at the top of the white box. 8(c) shows the voltage behavior at the bottom of the white box.
9 shows the luminance in the upper and lower regions of the white box of the display device when the self-capacitance is smaller than the neighboring capacitance. 9(a) shows the brightness of the white box at the top and bottom when the self capacitance is smaller than the neighboring capacitance. 9(b) shows the voltage behavior at the top of the white box. 9(c) shows the voltage behavior at the bottom of the white box.
10 is a plan view of a pixel positioned in the first area A1 according to another exemplary embodiment.
11 is a plan view of a pixel positioned in a second area A2 according to another exemplary embodiment.
12 illustrates a display device according to another exemplary embodiment of the present invention .

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description have been omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, so the present invention is not necessarily limited to the illustrated bar. In the drawings, the thicknesses are enlarged to clearly express various layers and regions. And in the drawings, for convenience of description, the thickness of some layers and regions is exaggerated.

In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" or "on" another part, this includes not only "directly over" another part, but also a case where another part is in the middle. . Conversely, when one part is "directly above" another part, it means that there is no other part in the middle. In addition, to be "on" or "on" the reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "above" or "on" the direction opposite to the gravity. .

In addition, throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

In addition, throughout the specification, when referred to as "on a plane", it means when the target portion is viewed from above, and when referred to as "cross-sectional view", it means when the cross-section of the target portion vertically cut is viewed from the side.

Hereinafter, a display device according to an exemplary embodiment of the present invention will be described in detail with reference to the drawings.

1 schematically illustrates a display device 1000 according to an exemplary embodiment of the present invention. Referring to FIG. 1, a display device 1000 according to an exemplary embodiment includes a first area A1 and a second area A2. As illustrated in FIG. 1, a first area A1 and a second area A2 are positioned on one side of the display device 100 with respect to the center in the second direction DR2. The scan is performed in the direction from the first area A1 to the second area A2. As will be described in detail later, the capacitance Cdp between the data line and the pixel electrode is different from each other in the first area A1 and the second area A2.

That is, in one pixel of the display device according to the present embodiment, the pixel electrode overlaps the two data lines. In this case, one data line is a data line (hereinafter, referred to as a first data line) connected to a corresponding pixel, and the other data line is a data line (hereinafter, referred to as a second data line) connected to a neighboring pixel.

In the pixel located in the first area A1, the capacitance between the first data line and the pixel electrode (hereinafter, self-capacitance Cdp1) is greater than the capacitance between the second data line and the pixel electrode (hereinafter, the neighboring capacitance Cdp2). small.

In addition, the pixel located in the second area A2 has a higher self capacitance Cdp1 than the neighboring capacitance Cdp2. In this way, by varying the self capacitance Cdp1 and the neighboring capacitance Cdp2 of each pixel for each area of the display device, it is possible to compensate for the luminance deviation due to the data voltage. Specific effects will be described in detail later separately.

Hereinafter, the pixels located in the first area A1 and the second area A2 will be described in detail with reference to the drawings.

In this specification, the meaning of a pixel includes an area occupied by one transistor and a pixel electrode connected thereto, and FIG. 2 illustrates one pixel.

2 is a layout diagram of one pixel positioned in the first area A1. 3A is a cross-sectional view of the display device of FIG. 2 taken along line IIIa-IIIa'. 3B is a cross-sectional view of the display device of FIG. 2 taken along line IIIb-IIIb'.

Referring to FIGS. 2 and 3A, a plurality of gate lines 121 disposed on a first substrate 110 made of transparent glass or plastic are included.

The gate line 121 transmits a gate signal and extends in the first direction DR1. The gate line 121 includes a gate electrode 124 connecting the first gate line 121a and the second gate line 121b, the first gate line 121a and the second gate line 121b spaced apart from each other. do.

Also, the storage electrode line 129 may be positioned on the same layer as the gate line 121. The storage electrode line 129 includes a first storage electrode line 129a, a second storage electrode line 129b, and a third storage electrode line 129c extending in the second direction DR2, and the first storage electrode line 129a, The second storage electrode line 129b and the third storage electrode line 129c are connected to a horizontal storage electrode line 129d extending parallel to the first direction DR1. The second storage electrode line 129b may include two portions spaced apart from each other, and the second storage electrode line 129b not connected to the horizontal storage electrode line 129d may be located in an island shape.

A gate insulating layer 140 made of an insulating material such as silicon oxide or silicon nitride is positioned on the gate line 121 and the storage electrode line 129. The gate insulating layer 140 may have a multilayer structure including at least two insulating layers having different physical properties.

A plurality of semiconductor layers 154 are positioned on the gate insulating layer 140. The semiconductor layer 154 may be positioned to overlap the gate electrode 124. In addition, the dummy semiconductor layer 155 positioned on the same layer as the semiconductor layer 154 is a position where the gate line 121 and the data line 171 cross, and the position where the storage electrode line 129 and the data line 171 cross. Can be located in The dummy semiconductor layer 155 relieves a step difference in a region where the wiring crosses. However, the dummy semiconductor layer 155 does not constitute a transistor or the like.

Next, a plurality of data lines 171 and a plurality of source electrodes 173 and a plurality of drain electrodes 175 connected to the data lines 171 are positioned on the semiconductor layer 154 and the gate insulating layer 140.

The data line 171 extends in the second direction DR2 and crosses the gate line 121. The data line 171 includes a first data line 171a and a second data line 171b. The first data line 171a and the second data line 171b do not overlap the storage electrode line 129 but overlap the pixel electrode 191 and are positioned in the pixel area.

Specifically, the first data line 171a may be positioned between the first storage electrode line 129a and the second storage electrode line 129b. In addition, the second data line 171b may be positioned between the second storage electrode line 129b and the third storage electrode line 129c.

The first data line 171a constitutes a transistor of an overlapping pixel. However, the second data line 171b constitutes a transistor of another pixel (not shown) neighboring in the second direction. That is, in the present embodiment, two data lines overlap one pixel electrode 191, but only one data line 171a is electrically connected to the pixel electrode 191, and the other data line 171b Is electrically connected to neighboring pixel electrodes.

The second data line 171b may be bent and positioned near an edge of the pixel electrode 191 in the second direction DR2. The first data line 171a may also be bent and positioned near the edge of the pixel electrode 191 in the second direction DR2. In this case, the length at which the second data line 171b is bent may be longer than the length at which the first data line 171a is bent.

A part of the first data line 171a constitutes the source electrode 173. The source electrode 173 extends from the data line 171, overlaps the gate electrode 124, and may generally have a U shape. The drain electrode 175 is separated from the data line 171 and extends upward from the center of the U-shaped source electrode 173.

One gate electrode 124, one source electrode 173, and one drain electrode 175 form one thin film transistor (TFT) together with the semiconductor layer 154, and the channel region of the thin film transistor Silver is formed on the semiconductor layer 154 between the source electrode 173 and the drain electrode 175.

Next, a plurality of color filters 230 are positioned on the data line 171. The color filter may include a red color filter (not shown), a green color filter (not shown), and a blue color filter (not shown). Each color filter may be positioned one at a time in a region corresponding to one pixel electrode 191.

Next, the insulating layer 180 is positioned. The insulating layer 180 may be made of an inorganic insulating material such as silicon nitride or silicon oxide, an organic insulating material, or a low dielectric constant insulating material.

The insulating layer 180 and the color filter 230 include a contact hole 181 overlapping the drain electrode 175. The pixel electrode 191 is physically and electrically connected to the drain electrode 175 through the contact hole 181 and receives a data voltage from the drain electrode 175.

The pixel electrode 191 may include a transparent conductor such as ITO or IZO. The pixel electrode includes a horizontal stem portion 192 extending in the first direction DR1 and a vertical stem portion 193 intersecting the horizontal stem portion and extending in the second direction DR2. The fine branch portions 199 protrude from each stem portion.

The pixel electrode 191 includes an outer vertical stem portion 195 that overlaps with the first storage electrode line 129a and the third storage electrode line 129c and extends along the second direction DR2, respectively. The outer vertical stem portion 195 is connected to the edge of the horizontal stem portion 192 of the pixel electrode 191.

In addition, the pixel electrode 191 includes an outer horizontal stem portion 196. The outer horizontal stem 196 is located adjacent to the transistor TFT, and a part of the outer horizontal stem 196 is connected to the drain electrode 175 through the contact hole 181 to receive a voltage.

A part of the outer horizontal stem part 196 protrudes and includes a first protrusion 196a overlapping the first data line 171a and a second protrusion 196c overlapping the second data line. The first data line 171a and the first protrusion 196a overlapping each other constitute a self capacitance Cdp1. In addition, the second data line 171b and the second protrusion 196b overlapping each other constitute a neighboring capacitance Cdp2.

Referring to FIG. 1, the area of the second protrusion 196b is larger than the area of the first protrusion 196a. Accordingly, the value of the neighboring capacitance Cdp2 between the second protrusion 196b and the second data line 171b is greater than the value of the self capacitance Cdp1. As shown in FIG. 2, the pixel located in the first area A1 of the display device can compensate for the luminance deviation due to the data voltage because the value of the neighboring capacitance Cdp2 is greater than the value of the self-capacitance Cdp1. have. Specific effects will be described later.

Referring to FIG. 2, an overlapping pixel electrode 197 overlapping a portion of the gate line 121 is included. The overlapping pixel electrode 197 may extend along the first direction DR1.

Next, referring to FIGS. 2 and 3A, the light blocking member 220 is positioned on the pixel electrode 191. The light blocking member 220 is positioned along the first direction DR1 and is positioned to overlap the transistor and the gate line 121. In FIG. 2, an area overlapping the light blocking member 220 will be referred to as a light blocking area, and an area not overlapping with the light blocking member 200 will be referred to as a display area.

Next, referring to FIG. 3A, the common electrode 270 is positioned on the second substrate 210. A liquid crystal layer 3 including liquid crystal molecules 31 is positioned between the first display panel 100 and the second display panel 200.

FIG. 3B shows another cross-section with respect to FIG. 2. Referring to FIG. 3B, the first storage electrode line 129a, the second storage electrode line 129b, and the third storage electrode line 129c are located spaced apart from each other on the first substrate 110, and a first data line therebetween. (171a) and the second data line 171b are positioned. Descriptions of other components are the same as those in FIG. 3A, so detailed descriptions of the same components will be omitted.

Hereinafter, an arrangement of one pixel positioned in the second area A2 of FIG. 1 will be described with reference to FIG. 4. 4 is a layout diagram of one pixel positioned in the second area A2. Referring to FIG. 4, the arrangement of the pixels positioned in the second area A2 is the same as in FIG. 2 except for the configuration of the protrusion 196a of the outer horizontal stem 196. Detailed descriptions of the same components will be omitted.

Referring to FIG. 4, in the pixel according to the present exemplary embodiment, the outer horizontal stem portion 196 does not include the second protrusion, but includes only the first protrusion 196a. Accordingly, the first protrusion 196a and the first data line 171 constitute the self capacitance Cdp1, and the value of the self capacitance Cdp1 becomes larger than the value of the neighboring capacitance Cdp2. In the present embodiment, the second protrusion is not located, but the outer horizontal stem portion 196 and the second data line 171b partially overlap each other, so that the neighboring capacitance Cdp2 is formed in the overlapping area. However, since the second data line 171b does not have a configuration corresponding to the first protrusion 196a overlapping the first data line 171a, the self-capacitance Cdp1 is greater than the neighboring capacitance Cdp2.

Further, the area of the first protrusion 196a of FIG. 4 is larger than the area of the first protrusion 196a of FIG. 2. The first protrusion 196a of FIG. 2 is positioned so that the second data line 171b is bent near the edge of the pixel electrode 191 in the second direction DR2. Such a bent portion of the second data line 171b It is a structure positioned to compensate for the capacitance caused by. Accordingly, the pixel of FIG. 4 must have a larger area of the first protrusion 196a than that of the pixel of FIG. 2, and in this case, the self capacitance Cdp1 becomes larger than the neighboring capacitance Cdp2.

That is, the display device according to the present exemplary embodiment further includes a second protrusion in which the pixel located in the first area A1 overlaps the second data line, so that the neighboring capacitance Cdp2 is larger than the self capacitance Cdp1, and the second Since the pixel located in the area A2 has a larger area of the first protrusion overlapping the first data line and does not include the second protrusion, the self capacitance Cdp1 is greater than the neighboring capacitance Cdp2. When the magnetic capacitance Cdp1 and the neighboring capacitance Cdp2 are different from each other for each area of the display device, a luminance deviation due to the data voltage may be compensated.

5 illustrates various causes and results that affect luminance in a display device. Referring to FIG. 5, when displaying an image with a white box in the middle, if the magnetic capacitance Cdp1 is large, the image appears bright at the top of the white box and dark at the bottom. Conversely, when the self-capacitance (Cdp1) decreases, the image appears dark at the top of the white box and brighter at the bottom.

The luminance of the display device is also affected by TFT leakage and data voltage. In particular, in the display device according to the present exemplary embodiment, since the data line 171 and the pixel electrode 191 overlap in the display area, the luminance effect of the data voltage is large. Referring to FIG. 5, changes in luminance due to the data voltage appear brightly at the top and bottom of the white box.

Accordingly, a problem occurs in that the display device is brightly recognized at the top and bottom of the white box by the data voltage. However, in the display device according to the present exemplary embodiment, the self-capacitance Cdp1 at the top of the white box, that is, at the top of the display device, is made smaller than the neighboring capacitance Cdp2 so that the display device is viewed darkly, thereby compensating for the luminance brightened by the data voltage. have. In addition, at the bottom of the white box, that is, at the bottom of the display device, the self capacitance Cdp1 is made larger than the neighboring capacitance Cdp2 so that the display device is darkly recognized, thereby compensating for the brightness brightened by the data voltage.

6 is a measurement of luminance of a display device when an image not including a white box is displayed. FIG. 6(a) shows a measurement point, and FIG. 6(b) is an image measuring the luminance at the measurement point. In FIG. 6A, the display panel 1100 and the pad 700 are illustrated. Referring to FIG. 6(b), it was confirmed that there was no luminance deviation for each position within the pixel in the case of an image without a white box.

7 is a measurement of luminance of a display device when an image including a white box is displayed. Fig. 7(a) shows a measurement point, and Fig. 7(b) is an image of measuring luminance at the measurement point. In FIG. 7A, the display panel 1100 and the pad 700 are illustrated. Referring to FIG. 7B, in the case of an image including a white box, it can be seen that luminance deviation appears for each location within the pixel. 7(c) shows the luminance for each position in the same cross section as in FIG. 3B. Referring to FIG. 7C, the luminance is high near the first data line 171a electrically connected to the pixel electrode 191, and the second data line 171b not electrically connected to the pixel electrode 191. It was confirmed that the luminance appeared low in the vicinity.

7(d) shows the reason why the luminance appears high in the vicinity of the first data line 171a and the luminance appears low in the vicinity of the second data line 171b. Referring to FIG. 7D, in the vicinity of the first data line 171a connected to the pixel electrode and supplied with the data voltage 15V, the potential increases and the luminance increases. However, in the vicinity of the second data line 171b that is connected to the neighboring pixel electrode and is not supplied with a data voltage when driving the corresponding pixel, the potential decreases and thus the luminance decreases.

FIG. 8 shows the luminance in the upper and lower regions of the white box of the display device when the self-capacitance Cdp1 is greater than the neighboring capacitance Cdp2. 8(a) shows the brightness of the white box at the top and bottom when the self capacitance Cdp1 is greater than the neighboring capacitance Cdp2. In FIG. 8A, the display panel 1100 and the pad 700 are illustrated. Referring to FIG. 8(a), the upper part of the white box appears brighter, and the lower part of the white box appears darker. Figure 8(b) shows the voltage behavior at the top of the white box. As shown in Fig. 8(b), the image of the bar driving in the direction in which the data voltage is spread appears brightly at the top of the white box. 8(c) shows the voltage behavior at the bottom of the white box. As shown in Fig. 8(c), the image appears dark when the data voltages are driven in a direction closer to each other at the bottom of the white box.

9 shows the luminance in the upper and lower regions of the white box of the display device when the self-capacitance Cdp1 is smaller than the neighboring capacitance Cdp2. 9(a) shows the brightness of the white box at the top and bottom when the self-capacitance Cdp1 is smaller than the neighboring capacitance Cdp2. In FIG. 9A, the display panel 1100 and the pad 700 are illustrated. Referring to Fig. 9(a), the upper part of the white box appears darker, and the lower part of the white box appears brighter. 9(b) shows the voltage behavior at the top of the white box. As shown in FIG. 9(b), the image appears dark when the data voltages are driven in a direction closer to each other at the top of the white box. 9(c) shows the voltage behavior at the bottom of the white box. As shown in FIG. 9(c), the image appears dark when the data voltages are driven in a direction away from each other at the bottom of the white box.

That is, the display device according to the present exemplary embodiment uses a phenomenon in which the luminance at the top/bottom of the white box varies according to the difference between the self capacitance Cdp1 and the neighboring capacitance Cdp2, The phenomenon that is displayed brightly by increasing is solved.

That is, when the self capacitance Cdp1 and the neighboring capacitance Cdp2 are appropriately adjusted to compensate for the bright luminance so that the luminance is lowered, the luminance brightness due to the data voltage is compensated.

In this case, a method of reducing the luminance for each area is different based on the center of the display device. That is, referring to FIG. 5, in order to reduce the luminance of the upper end of the display device, that is, the upper end of the white box, the self-capacitance Cdp1 must be smaller than the neighboring capacitance Cdp2. Accordingly, as shown in FIG. 2, a second protrusion 196b is added to increase the neighboring capacitance Cdp2.

Referring back to FIG. 5, in order to reduce the luminance at the lower end of the display device, that is, at the lower end of the white box, the self capacitance Cdp1 must be greater than the neighboring capacitance Cdp2. Accordingly, the area of the first protrusion 196a is increased as shown in FIG. 4 to increase the self capacitance Cdp1.

In the above, an embodiment in which the self-capacitance Cdp1 and the neighboring capacitance Cdp2 are adjusted using the first protrusion 196a and the second protrusion 196b, which are part of the pixel electrode 191, has been described. However, the self-capacitance Cdp1 and the neighboring capacitance Cdp2 may be adjusted by adjusting the width of the data line instead of the pixel electrode 191.

10 and 11 illustrate pixels positioned in a first area A1 and a second area A2 in a display device according to another exemplary embodiment.

10 is a plan view of a pixel located in the first area A1, and FIG. 11 is a plan view of a pixel located in the second area A2.

Referring to FIG. 10, the width of the pixel according to the present exemplary embodiment is extended in a region where the second data line 171b overlaps the light blocking member 220. That is, the existing pixel electrode 191 and the second data line 171b overlap by increasing the width of the second data line 171b without adding a separate protrusion on the same layer as the pixel electrode 191 Increased the area. Therefore, the neighboring capacitance (Cdp2) is made larger than the self capacitance (Cdp1), and in this case, since it is the upper region of the display device, the luminance decreases as can be seen in FIG. 5, and thus, similar to FIG. You can compensate. Other components are the same as described above, and detailed descriptions of the same components will be omitted.

Referring to FIG. 11, the width of the pixel according to the present exemplary embodiment is extended in a region where the first data line 171a overlaps the light blocking member 220. That is, by increasing the width of the first data line 171a without changing the area of the first protrusion 196a, the area where the existing pixel electrode 191 and the first data line 171a overlap is increased. Therefore, the self-capacitance (Cdp1) is made larger than the neighboring capacitance (Cdp2). Since the second area A2 is a lower area of the display device, in this case, as shown in FIG. 5, the luminance decreases, and thus, similar to FIG. 4, an increase in luminance due to the data voltage can be compensated for. Other configurations are the same as described above, and detailed descriptions of the same components will be omitted.

In the above, the display device is divided into a first area A1 and a second area A2. In the first area A1, the self capacitance Cdp1 is smaller than the neighboring capacitance Cdp2, and in the second area A2 A configuration in which the self-capacitance (Cdp1) is larger than the neighboring capacitance (Cdp2) has been described. However, in another embodiment, the difference between the self-capacitance Cdp1 and the neighboring capacitance Cdp2 may increase and decrease in steps.

12 illustrates a display device 1000 according to another exemplary embodiment of the present invention. Referring to FIG. 12, the upper region farthest from the center of the display device 1000 has a large difference between the magnetic capacitance Cdp1 and the neighboring capacitance Cdp2. However, as it approaches the center, the difference between the self capacitance Cdp1 and the neighbor capacitance Cdp2 decreases, and the self capacitance Cdp1 and the neighbor capacitance Cdp2 become the same at the center of the display device.

The self-capacitance Cdp1 is greater than the neighboring capacitance Cdp2 at the bottom while passing through the center of the display device 1000, and the difference increases as the distance from the center increases. When the difference between the self-capacitance Cdp1 and the neighboring capacitance Cdp2 is adjusted stepwise in this way, an increase in luminance due to the data voltage can be effectively compensated.

In this case, the values of the self capacitance Cdp1 and the neighbor capacitance Cdp2 may be adjusted in various ways. That is, as shown in FIGS. 2 to 4, the pixel electrode 191 and the first protrusion 196a and the second protrusion 196b may be adjusted by using the area of the first protrusion 196a and the second protrusion 196b, as shown in FIGS. As described above, it may be adjusted using the widths of the first data line 171a and the second data line 171b.

As the area of the protrusion increases or the width of the data line increases, the capacitance increases, and a person skilled in the art may adjust the capacitance by gradually increasing or decreasing the area or width for each area of the display device 1000.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (20)

A substrate including a first region and a second region;
A plurality of pixels positioned on the substrate,
The pixel includes a first data line and a second data line overlapping the pixel electrode,
In the pixel located in the first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode,
The pixel positioned in the second area has a first capacitance between the first data line and the pixel electrode greater than a second capacitance between the second data line and the pixel electrode. In claim 1,
The display device scans the display panel from a first area to a second area. In claim 1,
The plurality of pixels
A gate line positioned on the substrate;
A data line insulated from the gate line;
The data line includes the first data line and the second data line,
The pixel electrode overlapping the first data line and the second data line;
A pixel electrode protrusion connected to the pixel electrode,
The pixel positioned in the first area includes a second pixel electrode protrusion overlapping the second data line. In paragraph 3,
An area of the protruding portion of the first pixel electrode overlapping the first data line in the pixel located in the second area,
A display device that is larger than an area of a protrusion of a first pixel electrode overlapping the first data line of a pixel positioned in the first area. In claim 1,
The first data line is electrically connected to a pixel electrode of the pixel,
The second data line is not electrically connected to a pixel electrode electrically connected to the first data line. In clause 5,
The pixel includes a display area and a light blocking area,
In the pixel located in the first area, a width of the first data line in the light blocking area is narrower than a width of the second data line. In paragraph 6,
In the pixel located in the second area, a width of the first data line in the light blocking area is wider than a width of the second data line. In claim 1,
Further comprising a plurality of semiconductor layers positioned between the gate line and the data line,
The plurality of semiconductor layers include a dummy semiconductor layer positioned in a region where the gate line and the data line cross each other. In clause 8,
The gate line includes a first gate line, a second gate line, and a gate electrode positioned between the first gate line and the second gate line in parallel with each other,
Some of the plurality of semiconductor layers are positioned to overlap the gate electrode and constitute a transistor. In claim 1,
The first data line and the second data line are bent at one edge of the pixel electrode,
The display device in which the second data line is bent is longer than the first data line is bent. In paragraph 3,
Further comprising a storage electrode line positioned on the same layer as the gate line,
The storage electrode line includes a first storage electrode line, a second storage electrode line, and a third storage electrode line,
The first storage electrode line is located adjacent to one edge of the pixel electrode,
The third storage electrode line is located adjacent to the other edge of the pixel electrode,
The second storage electrode line is positioned to overlap the center of the pixel electrode. In clause 11,
The first data line is located between the first storage electrode line and the second storage electrode line,
The second data line is positioned between the second storage electrode line and the third storage electrode line. A substrate including a first region and a second region;
A plurality of pixels positioned on the substrate,
The pixel includes a first data line and a second data line overlapping the pixel electrode,
In the pixel located in the first area, a first capacitance between the first data line and the pixel electrode is smaller than a second capacitance between the second data line and the pixel electrode,
The difference between the first capacitor and the second capacitance in the first region gradually decreases as the first capacitor approaches the second region. In claim 13,
In the pixel located in the second area, a first capacitance between the first data line and the pixel electrode is greater than a second capacitance between the second data line and the pixel electrode,
The difference between the first capacitance and the second capacitance in the second area gradually increases as the distance from the first area increases. In claim 13,
The first capacitance and the second capacitance are the same in a central area of the substrate. In claim 13,
The plurality of pixels
A gate line positioned on the substrate;
A data line insulated from the gate line;
The data line includes the first data line and the second data line,
The pixel electrode overlapping the first data line and the second data line;
A pixel electrode protrusion connected to the pixel electrode,
The pixel located in the first area includes a second pixel electrode protrusion overlapping the second data line,
In the pixel located in the second area, the area of the first pixel electrode protrusion overlapping the first data line is larger than the area of the first pixel electrode protrusion overlapping the first data line of the pixel located in the first area. Display device. In claim 13,
The pixel includes a display area and a light blocking area,
In the pixel located in the first area, the width of the first data line is smaller than the width of the second data line in the light blocking area,
In the pixel located in the second area, a width of the first data line in the light blocking area is wider than a width of the second data line. In claim 13,
The first data line is electrically connected to a pixel electrode of the pixel,
The second data line is not electrically connected to a pixel electrode electrically connected to the first data line. A substrate including a first region and a second region;
A plurality of pixels positioned on the substrate,
The pixel includes a first data line and a second data line overlapping the pixel electrode,
The pixel located in the first area includes a second pixel electrode protrusion overlapping the second data line,
The area of the first pixel electrode protrusion overlapping the first data line in the pixel located in the second region is larger than the area of the first pixel electrode protrusion overlapping the first data line of the pixel located in the first region. Display device. A substrate including a first region and a second region;
A plurality of pixels positioned on the substrate,
The pixel includes a first data line and a second data line overlapping the pixel electrode,
The pixel includes a display area and a light blocking area,
In the pixel located in the first area, the width of the first data line is smaller than the width of the second data line in the light blocking area,
In the pixel located in the second area, a width of the first data line in the light blocking area is wider than a width of the second data line.

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